Display shelf



FIG. 1 is a perspective view of a display shelf shown in environment;

FIG. 2 is a another perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof; and,

FIG. 6 is a top view thereof.

The broken lines are for purposes of illustration and form no part of the claimed design. 

CLAIM I claim the ornamental design for a display shelf, as shown and described. 